水下切割主要有水下气割、氧-弧水下切割和金属-电弧水下切割等，这些方法都属于热切割方法。
切割炬已经可以手持，并可以进行水下切割。
Cutting torch already can be held by hand, and could be carried out underwater.
切割精度比火焰切割高，水下切割无变形，精细等离子切割则精度更高。
The cutting precision than high flame cutting, cutting no deformation, fine underwater plasma cutting is a higher precision.
文章对比分析了当前可以采用的水下切割技术，指出射流切割更具有发展潜力。
Although all techniques may be practiced underwater, the water jet cutting is advanced and better.
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